Ans: (a) $99.5\text{ g}$ (b) No
- Note that the maximum absolute error
$\begin{array}{rl}
= & 1\times \dfrac{1}{2} \\
= & 0.5 \text{ g}
\end{array}$Therefore the least possible weight of a regular pack of sea salt
$\begin{array}{cl}
= & 100 – 0.5 \\
= & 99.5\text{ g}
\end{array}$ - The least possible weight of $32$ regular packs of sea
$\begin{array}{cl}
= & 99.5 \times 32 \\
= & 3~184\text{ g} \\
= & 3.184\text{ kg} \\
= & 3.2 \text{ kg, correct to the nearest 0.1 kg}
\end{array}$Therefore, it is impossible that the weight of $32$ regular packs of sea salt is measured as $3.1\text{ kg}$ correct to the nearest $0.1\text{ kg}$.
